Document corpse backpack MVP decision

Scripts/verify_corpse_backpack_decision.py

@@ -0,0 +1,31 @@
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+
+
+def require(path: Path, snippet: str) -> None:
+    text = path.read_text(encoding="utf-8")
+    if snippet not in text:
+        raise SystemExit(f"{path.relative_to(ROOT)} missing {snippet!r}")
+
+
+def main() -> None:
+    roadmap = ROOT / "AGRARIAN_DEVELOPMENT_ROADMAP.md"
+    persistence = ROOT / "Docs" / "PersistenceDesignDocument.md"
+    networking = ROOT / "Docs" / "MultiplayerNetworkingDesign.md"
+
+    require(roadmap, "[x] Add corpse/backpack placeholder if needed.")
+    require(roadmap, "no physical")
+    require(roadmap, "corpse/backpack actor is needed for the 0.1.J MVP respawn loop")
+    require(roadmap, "persistent, server-owned, interaction-gated death-recovery record")
+    require(persistence, "the MVP death/respawn loop does not spawn a physical corpse or")
+    require(persistence, "death event id/location")
+    require(networking, "does not spawn a corpse/backpack container in 0.1.J")
+    require(networking, "server-owned, interaction-gated")
+
+    print("PASS: corpse/backpack MVP decision is documented.")
+
+
+if __name__ == "__main__":
+    main()